A growing economic crisis could threaten Putin’s rule in the next two years, says one of Russia’s leading economists, now living in exile in Paris. International sanctions in response to the Crimea annexation are taking a toll, along with falling oil prices. Panic buying of staples like buckwheat have ensued, as food inflation rises. Even the luxury market has shrunk. Those at home are slowly starting to speak out too. Putin says all he has to do is smile. But not even he may be able to wrestle this tiger.